oldies but goodies:
- Maxima a computer algebra system, almost like a free version of Mathematica!
- be sure to install maxima-emacs to get LaTeX prettyprinting.
- [xpaint] Has a cool spring-mass-friction system where the length of the spring (the distance between cursor and paint brush) controls the width of the paint brush. see below!
Both are in Debian of course :) |